EP 0598496 B1 20010103 - Frequency drop-out compensation
Title (en)
Frequency drop-out compensation
Title (de)
Kompensation von Frequenzausfall
Title (fr)
Compensation de perte du signal de fréquence
Publication
Application
Priority
KR 920019425 A 19921022
Abstract (en)
[origin: EP0598496A1] A frequency drop-out compensating circuit for both NTSC and PAL systems in an optical disk system includes amplifiers 10, 20 and 30 for amplifying an applied FM signal, a pulse generator 50 for converting a frequency drop-out signal detected from the amplified FM signal into a pulse signal and a drop-out compensator 60 for compensating the drop-out when a frequency drop for the signal generated from the pulse generator 50 is generated. An integrator 41 integrates the FM signal generated from the amplifiers 10, 20 and 30 and an integrating current controller 42 controls the integrating current of the integrator 41 according to the applied FM signal. Therefore, drop-out can be detected and compensated in signals for both NTSC and PAL systems, by controlling the integrating current in consideration of the FM band utilized. <IMAGE>
IPC 1-7
IPC 8 full level
H04N 5/94 (2006.01); H04N 9/79 (2006.01); H04N 9/80 (2006.01); H04N 9/88 (2006.01); H04N 9/82 (2006.01); H04N 9/835 (2006.01)
CPC (source: EP US)
H04N 9/7925 (2013.01 - EP US); H04N 9/88 (2013.01 - EP US); H04N 9/8222 (2013.01 - EP US); H04N 9/835 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0598496 A1 19940525; EP 0598496 B1 20010103; DE 69329817 D1 20010208; DE 69329817 T2 20010503; JP 2941616 B2 19990825; JP H06225338 A 19940812; KR 0165251 B1 19990320; US 5438425 A 19950801
DOCDB simple family (application)
EP 93308371 A 19931020; DE 69329817 T 19931020; JP 26130993 A 19931019; KR 920019425 A 19921022; US 13818393 A 19931020